May 13, 2026  Griddler 13118 Dragonfly Requires a Guess

    

    Simple line solving on this one was exhausted faster than on any nonogram Martin’s ever seen! The claims in the comments are that there is a single, very hard to find, key that lets you solve the puzzle very quickly once you find it. After hours of looking for it, Martin concluded finding the key involves a guess.

At the top is absolutely all that simple line solving can do. Yep, all of 13 cells. If you can find anything more, email the webmaster! It looked like there was a perfect guess. The rightmost 2 in row 6 can be in only two places, where the circles are. Since this is being done after solving the puzzle, the bad guess is where the red circles are, the good guess is where the green circles are. 

At the left, you take the guess by striking out the borders of the 2 in row 6 and that forces the 5 in column 15 to go all the way to the top.

Martin ran the nonogram solver program after he’d solved it and it took 754 probes. So even with it’s super sophisticated line solver, it had to take what you could call 754 guesses. Therefore, Martin doesn’t think anybody is going to find a purely logical solution. You are simply going to have to probe and check.